How the MLB postseason works: 12 teams, byes and tiebreakers
The Milwaukee Brewers won the World Series on October 28 without playing a game in the first round. That wasn't luck. It was the format. The two best division winners in each league skip the Wild Card Series entirely, and in 2026 the Brewers were the top seed in the National League.
Here's how baseball's postseason works, from seeding to the last out, and the games from this October worth going back to. The format comes from MLB's own explainers on mlb.com, checked on November 11, 2026.
Who gets in
Twelve teams make it, six from each league:
- Three division winners, seeded 1 through 3 by record.
- Three Wild Card teams, the three best records among the teams that didn't win their division, seeded 4 through 6.
A division winner is always seeded above every Wild Card team, even one with a better record. That's why a 3 seed can host a series against a 4 seed that won more games.
The bracket
| Round | Length | Who plays at home |
|---|---|---|
| Wild Card Series | Best of three | Every game at the higher seed |
| Division Series | Best of five | Higher seed hosts Games 1, 2 and 5 |
| League Championship Series | Best of seven | Higher seed has home field |
| World Series | Best of seven | Better regular-season record has home field |
Wild Card Series. The 3 seed plays the 6 seed and the 4 seed plays the 5 seed. All three games are in the higher seed's park, so there's no travel and no home game for the lower seed at all. This replaced the old one-game Wild Card playoff in 2022.
The byes. The 1 and 2 seeds sit out the first round and go straight to the Division Series. The 1 seed plays the winner of 4 vs. 5, and the 2 seed plays the winner of 3 vs. 6. The bracket is fixed. There's no reseeding after the first round, so a 1 seed can't get a softer opponent because of an upset elsewhere.
Division Series. Best of five, 2-2-1, with the higher seed getting the first two games and a Game 5.
League Championship Series and World Series. Both best of seven. In the LCS, the higher seed gets home field. In the World Series, seeds from different leagues don't compare, so home field goes to the team with the better regular-season record.
The bye cuts both ways. The top two seeds avoid a short series where anything can happen, but they also sit for several days while the Wild Card teams stay sharp. Fans argue about whether the rest helps or hurts every October. This year, the AL's 1 seed and the NL's 1 seed both made the World Series.
Tiebreakers: no more Game 163
Baseball used to break ties for a playoff spot with an extra regular-season game, the famous Game 163. That's gone. Every tie is now settled on paper, so the postseason can start right after the season ends.
For two teams, head-to-head record during the season comes first. If that's even, it goes to record within the division, then to further steps MLB lays out for each case. Ties among three or more teams use a longer version of the same list. It means head-to-head games in August and September carry more weight than they look, because a 4-3 season series can decide a seed months later.
What we saw this October
The 2026 bracket ran from September 29 to October 28. The Brewers went 11-2: three games to one over San Diego, a sweep of the Dodgers in the NLCS, and four games to one over Tampa Bay. The Rays swept the Yankees and beat Cleveland in six to get there. These four games are where I'd start. The list leans toward late, close finishes, which is what made this October good.
- Phillies 4, Braves 3 (10 innings), NL Wild Card Game 2, September 30. One loss from elimination and down 3-1 in the eighth, the Phillies got back-to-back homers from Kyle Schwarber and Bryce Harper, then Alec Bohm's solo shot in the 10th forced a Game 3. Atlanta won that one.
- Brewers 5, Rays 4, World Series Game 2, October 24. Tampa Bay led 4-0 after the first. Sal Frelick tied it with a homer in the sixth and Cooper Pratt's single in the seventh won it.
- Rays 4, Brewers 3 (12 innings), World Series Game 4, October 27. Milwaukee was three outs from a sweep after Pratt led off the 12th with a homer, the first extra-inning homer by a rookie in World Series history. The Rays reached base five straight times in the bottom half, and pinch-hitter Ben Williamson walked it off.
- Brewers 4, Rays 1, World Series Game 5, October 28. Jacob Misiorowski threw 5 2/3 scoreless innings at Tropicana Field, and the Brewers won the first World Series in franchise history, Milwaukee's first since 1957.
How The Lineup Is treats these games
A postseason game picks up several of the factors on the how it works page at once. Elimination covers win-or-go-home games like Wild Card Game 2 and World Series Game 4. Playoff race covers the September games that decide who gets in and who gets a bye. Close game is the best single predictor of a good watch, before first pitch and once it's live. For MLB, a close-game alert goes out when a game is within 2 runs in the ninth inning or later, which is exactly when Game 4 got interesting. The MLB page will have next season's games when they start.
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